Cylinder Liner

Cylinder Liner 3904166 | Fleet Supply for Cummins ISB QSB

Cylinder Liner 3904166, Cummins B-Series ISB QSB, Ra ≤ 0.8 μm — replacement for mid-life engine maintenance on 4B3.9, 6B5.9, ISB and QSB platforms. Liner service typically aligns with mid-life overhaul intervals when coolant seepage or increased blow-by signals bore wear. Plan single or full-set exchange based on hours logged and bore measurement history across your fleet. Fleet maintenance supply with replacement interval guidance included on request for aging B-series platforms.

Cylinder Liner Sleeve 3904166 for Cummins 4B3.9 6B5.9 – Service Part

Cylinder Liner Sleeve 3904166 for Cummins 4B3.9 / 6B5.9, STD Grade — replacement for mid-range Cummins powerplants across ISB, QSB, and B-series variants. Scheduled liner service at major hour intervals addresses rising oil consumption and blow-by before unplanned teardowns. Stocking ahead of predictable wear milestones keeps fleet maintenance budgets and uptime targets on track. Maintenance interval guidance and cross-reference verification provided with every order.

Cylinder Liner 3904166 for Cummins 4B3.9 6B5.9 – Service Part

Cylinder Liner 3904166 for Cummins 4B3.9, 6B5.9, ISB & QSB Series — replacement for OEM cross-reference 3904166, DS-3904166, new aftermarket condition with 3-12 month warranty. Replace liners at scheduled overhaul intervals or when coolant contamination and compression loss signal advanced bore wear; inspect piston assemblies, ring packs, and rod bearings during the same teardown to decide between single-component service or full overhaul kit renewal. Aging Cummins B-series platforms remain supported with long-term aftermarket supply commitment.

Cylinder Liner Sleeve 3904166 for Cummins ISB, QSB & B Series – OEM-Grade Replacement

Stop downtime from warped or scored liners — this OEM-grade Cummins cylinder liner delivers precise bore geometry and surface finish to restore compression, reduce oil consumption, and extend engine life across your ISB and QSB fleet. Built to meet Cummins’ original metallurgical specs (ASTM A436 Type 2, Class 30), it’s drop-in compatible without honing for most rebuilds. Exact fit for ISB6.7 CM2250/CM2350 B101 and QSB5.9 CM850(CM2850) — no guesswork on interference or deck height Includes micro-finished internal surface (Ra ≤ 0.4 μm) for optimal piston ring seating right out of the box Ships from Guangzhou warehouse in 2–5 working days — no waiting weeks for OEM backorders Verified against DS-3904166OS and 3904166 cross-references to prevent mismatched kits